Godot Export: Correct path for uploading release artifacts

Since we're downloading multiple artifacts, each is placed in a
subdirectory. This commit corrects the path passed to `gh release upload`
to include all files in subdirectories, instead of matching the
folders in the current directory.

.github/workflows/godot.yml

@@ -109,4 +109,4 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ github.token }}
         run: |
-          gh release upload '${{ github.ref_name }}' * --repo '${{ github.repository }}'
+          gh release upload '${{ github.ref_name }}' */* --repo '${{ github.repository }}'